Experimental Investigation On Properties Of Dissimilar Laser Welding Of Aisi 316l To Monel 400

Amongst the welding techniques the laser beam welding process seems precise and less heat affected with high intensity. This investigation is focused to study the feasibility and to find optimal welding parameters for the AISI316L and monel400 dissimilar welding. The selected materials are widely applicable in the field of marine, heat exchangers and chemical industries for storage tanks. The Nd-Yag laser welding machine is used for this dissimilar welding and the process parameters like laser wire diameter, power and frequency are investigated. The weld quality is analyzed by the result of ultimate tensile strength, hardness and metallographic observation using the universal testing machine, Vickers hardness tester and optical microscope. The Taguchi L9 orthogonal array is used to fix the process parameters and the regression equations are obtained from the design expert shows the ANOVA model is significant. From the result it is inferred that the most influencing parameter observed is laser wire diameter for both the ultimate tensile strength and hardness. This experimentation of dissimilar welding gives betterment of welding industries for fixing the optimal process parameters. (C) 2019 Elsevier Ltd. All rights reserved.